881443125210121 has 4 divisors (see below), whose sum is σ = 881443188691092. Its totient is φ = 881443061729152.

The previous prime is 881443125210103. The next prime is 881443125210211. The reversal of 881443125210121 is 121012521344188.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 520197565465600 + 361245559744521 = 22807840^2 + 19006461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881443125210121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881443125214121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968236 + ... + 41997901.

It is an arithmetic number, because the mean of its divisors is an integer number (220360797172773).

Almost surely, 2^{881443125210121} is an apocalyptic number.

It is an amenable number.

881443125210121 is a deficient number, since it is larger than the sum of its proper divisors (63480971).

881443125210121 is a wasteful number, since it uses less digits than its factorization.

881443125210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63480970.

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 881443125210121 in words is "eight hundred eighty-one trillion, four hundred forty-three billion, one hundred twenty-five million, two hundred ten thousand, one hundred twenty-one".